Home / 20,515.17-28,320.36-12,016.11

Finding the Fourth Proportional to 20,515.17, 28,320.36 and 12,016.11

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Solution

The fourth proportional to 20,515.17, 28,320.36 and 12,016.11 is: 16,587.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.17 : 28,320.36 = 12,016.11 : x
  2. Step 2: Convert to fraction form
    20,515.17/28,320.36 = 12,016.11/x
  3. Step 3: Cross multiply
    20,515.17x = 28,320.36 × 12,016.11
  4. Step 4: Simplify right side
    20,515.17x = 340,300,561.00
  5. Step 5: Solve for x
    x = 340,300,561.00/20,515.17
  6. Step 6: Final answer
    x = 16,587.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.